How to print multiple PDF files in different folders?

1. To loop over multiple files recursively:

FOR /f "tokens=*" %%F in ('dir /s /b *.pdf') DO echo "%%F"

• dir /s /b *.pfd finds all pdfs (*.pdf), in all subdirectories (/s), in bare format - ie just the path name (/b)
• DO echo "%%F" just echo's the result to the console.
• "tokens=*" adds the whole line into %%F regardless of white spaces / other tokens
• /F makes it run the ('dir ...') command

2. To print from command line use: From this question

AcroRd32.exe /t "C:\Folder\File.pdf" "Brother MFC-7820N USB Printer" "Brother MFC-7820N USB Printer" "IP_192.168.10.110"

Note: Path to AcroRd32.exe must be in your path environment variable

3. Putting it all together -- edit -- 'I've added taskkill to close acrord32 after printing

FOR /f "tokens=*" %%F in ('dir /s /b *.pdf') DO AcroRd32.exe /t "%%~F" "Brother MFC-7820N USB Printer" "Brother MFC-7820N USB Printer" "IP_192.168.10.110" & taskkill /IM AcroRd32.exe